Monkey-wrench



, UNITED STATES PATENT OFFICE.

ALLEN K. SHEPPARD, OF CAMDEN, NEW JERSEY.

MONKEY-WRENCH.

SPECIFICATION forming part of Letters Patent No. 242,062, dated May 24, 1881.

Application tiled March 21, 1881.

Z'o all whom it may concern Be it known that I, ALLEN KINsMAN SHEP- PARD, of Camden, in the county of Camden and State ot' New Jersey, have invented a new and Improved lllonkey-Wrench, of which the following is a full, clear, and exact description.

Theinvention consists of a wrench in which one jaw is attached to a shank that slides within a hollow handle to which the other jaw is fastened, to which handle a cam-dog is pivoted that acts upon a block resting against the sliding'shank, which, with its jaw, can 4be locked in any desired position or released by turning the cam-dog.

- In the accompanying drawings, Figure l is a side perspective view of my im proved wrench. Fig. 2 is a longitudinal sectional elevation ot' the same. Fig, 3 is a rear-end elevation ofthe saine. Fig. 4 shows a modification ofthe camdog.

The upper jaw, A, ot' the wrench is rigidly attached to a shank, B, fitting into a hollow handle, C, to the upper end of which thelower jaw, D, otl the wrench is rigidly fastened. A cam-dog or eccentriclever, E, is pi voted to two jaws, F F, in the handle, near the middle of the same, on the rear side, and the cam or eccentric of this dog tits into a rounded recess in a block, G, resting against the shank B, which is provided with a corresponding recess, H, against the lower end ot' which thc block G rests when the shank B is drawn out to its greatest extent, and against the upper end of which it rests when thejaws rest on each other. The projection J, formed at the lower Aend of the shank B by the recess `H, prevents the shank from being drawn entirely out of the handle. The handle is made entirelyr of metal,

I prefer to use the pressure-block.

(No model.)

and its lower halt' is checked or serrated to prevent it from slippingin the hand.

It desired, the cam-dog may act directly upon theslidingshank,asshownin Fig. 4. However, The shank is slightly swelled at its connection with the jaw, to prevent the latter from breaking off.

The operation is as follows: The cam-dog E is raised, as shown in dotted lilies in Fig. 2, and the jaws'A D are then separated as much as may be required by drawing the shank B out ot' the hollow handle C. When the jaws are adjusted the cam-dog E is turned down, as shown, and thereby presses the block G against the shank B with sut'lieient force to lock the jaw A in the desired position.

The wrench is very simple in construction, is very durable, can be adjusted very rapidly and conveniently, and is not liable to get out of order.

A great advantage of this wrench is that its leverage is increased in case. large nuts are to be turned, for the shank B must be drawn out ofthe handle a certain distance, and the length ot' the wrench is thus increased.

Having thus described my invention, what l claim as new, and desire to secure by Letters Patent, is-

In a monkey-wrench, the combination, with the fixed shank B, having groove or recess H, ot the loose block Gr, fitting in said recess, and the hollow slide-handle, having the eccentriclever E, pivotcd to jaws F F, as and For the purpose specified.

ALLEN KINSMAN SHEPPARD` Witnesses:

T. F. BOAEDMAN, J AMES M. CAssADY. 

